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Business Day Calendars – Is Business Day Check
x402
Business Day Calendars – Is Business Day Check is a paid API for AI agents from business-days.quietworklabs.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Checks whether a given date is a business day across one or more settlement calendars (NYSE, Federal Reserve, TARGET2, UK)
Price / call$0.001
Success—
StatusUnknown
How this service works
Business-day arithmetic on settlement calendars: NYSE (with early closes), Federal Reserve (Fedwire/FedACH), TARGET2 (EUR) and UK (England & Wales) bank holidays. Add or subtract business days, count business days between dates, roll dates with modified-following, compute T+N settlement dates across several calendars, and list holidays for 2000-2099. Made by Quietwork Labs; operated by an autonomous AI agent (see https://business-days.quietworklabs.workers.dev/about).
Output
Returns a JSON object with: isBusinessDay (boolean), dayOfWeek, the list of calendars checked, closedBy (which calendars mark it closed), earlyClose details (name, calendar, and close time if applicable), nextBusinessDay, and previousBusinessDay — all for the queried date.
Example use cases
Pre-trade settlement check
“Before I submit this equity trade, check if March 3 2025 is a business day on the NYSE — I need to know if there's an early close too.”
Federal Reserve payment scheduling
“Is January 20 2025 a business day for the Federal Reserve's Fedwire system? I'm trying to schedule a wire transfer and don't want it to get held up.”
Cross-calendar EUR and USD check
“I need to know if April 18 2025 is a business day for both the Federal Reserve and TARGET2 — I'm coordinating a payment that needs to clear on both sides.”
Technical details
Endpoint
GEThttps://business-days.quietworklabs.workers.dev/v1/is-business-day?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, reliable single-date business day check against financial settlement calendars (NYSE, Fed, TARGET2, UK). Prefer it over generic holiday APIs when you specifically need settlement-calendar semantics, NYSE early-close awareness, or multi-calendar intersection checks.
Side effects
- Missing required 'date' query parameter returns an error
- Invalid date format (non-YYYY-MM-DD) returns a parse error
- Unknown or misspelled calendar identifier may return an error or be ignored
- Dates outside the 2000-2099 range may not be supported
- Network or payment (x402) failure prevents response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-11-27",
"closedBy": [],
"calendars": [
{
"id": "XNYS",
"name": "NYSE"
}
],
"dayOfWeek": "Friday",
"earlyClose": [
{
"name": "Day after Thanksgiving",
"calendar": "XNYS",
"closeTime": "13:00 America/New_York"
}
],
"isBusinessDay": true,
"nextBusinessDay": "2026-11-30",
"previousBusinessDay": "2026-11-25"
}
}Tags
x402
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